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Allen-Bradley 440G-T27178
by Allen-Bradley
Read verified buyer reviews ↓OverviewThe Allen-Bradley 440G-T27178 Guardmaster TLS-GD2 safety interlock switch is a crucial component for safeguarding personnel and machinery in challenging industrial environments. This safety solution is specifically designed to manage access securely and deliver dependable safety performance, particularly in locations where unrestricted entry or accidental interactions with machinery could lead to severe consequences. Operating on 110 V AC/DC and featuring a robust power-to-lock mechanism, the 440G-T27178 ensures that protective machine guards remain securely fastened until it is safe to proceed. Its design and operational capabilities reflect Allen-Bradley's dedication to advanced industrial safety, making it an indispensable asset in modern manufacturing and processing operations.Key Features Guardmaster TLS-GD2 Series: Integrates within Allen-Bradley's esteemed Guardmaster product line, ensuring proven reliability and consistent performance. Power-to-Lock Mechanism: Guarantees secure guard locking, preventing access until power is disengaged, thereby elevating operational safety protocols. Versatile Supply Voltage: Operates efficiently with both 110 V AC and DC power sources, offering enhanced flexibility during installation. Comprehensive Contact Configuration: Includes two N.C. safety contacts and one N.O. auxiliary contact for versatile integration into various control circuits. High Locking Force: Provides superior locking strength engineered to resist tampering and ensure guards remain securely sealed. Durable IP67/IP69K Protection: Guarantees robust protection against dust intrusion, water submersion, and rigorous high-pressure, high-temperature washdowns. Compact and Robust Industrial Design: Constructed to withstand harsh industrial conditions while optimizing spatial efficiency within safety systems. Technical Specifications Allen-Bradley Code: 440G-T27178 Series: Guardmaster TLS-GD2 Type: Safety Interlock / Guard Locking Switch Supply Voltage: 110 V AC/DC Contact Configuration: 2 N.C. (safety), 1 N.O. (auxiliary) Solenoid Contacts: 1 N.C. / 1 N.O. Actuator Type: GD2 standard Connection Type: M20 conduit, 1/2" NPT adapter Housing Material: High-grade Plastic Protection Rating: IP67 / IP69K Operating Temperature: –25 °C to +60 °C Certifications: CE, UL, cUL Logic: Break-before-make contact configuration Applications Advanced Machine Guarding Systems: Serves as an integral element for preventing access to hazardous machinery during operation or maintenance tasks. Critical Industrial Safety Circuits: Essential for implementing fail-safe mechanisms within complex automation setups. High-Speed Packaging and Processing Lines: Ensures operator safety while maintaining peak operational efficiency in sectors such as food & beverage and pharmaceuticals. Robotics and Automated Manufacturing Lines: Provides reliable guard locking mechanisms for robotic work cells and automated production zones. Hazardous Areas with Access Control: Suited for environments demanding stringent control over entry to dangerous processes or equipment. Pharmaceutical and Chemical Processing: Its robust protection ratings make it ideal for environments requiring frequent cleaning and washdowns. Why Choose This Model?The Allen-Bradley 440G-T27178 stands out as a premier choice for industrial safety due to several key advantages: Uncompromising Safety Standards: Delivers a high level of safety with a trustworthy guard locking function that actively shields personnel from harm. Exceptional Operational Reliability: Engineered to provide consistent and dependable performance, even within the most demanding industrial environments. Maximum Protective Assurance: Its significant locking force offers peace of mind, ensuring that guards remain securely locked when safety is the highest priority. Trusted Technological Heritage: Benefits from Allen-Bradley's Guardmaster safety technology, a global leader synonymous with advanced industrial safety solutions. Durability and Extended Lifespan: Constructed with robust materials and high protection ratings to endure harsh conditions, thereby extending product longevity. Global Regulatory Compliance: CE, UL, and cUL certifications confirm compliance with international safety standards, simplifying integration into worldwide operations. Order NowElevate your equipment safety protocols with the Allen-Bradley 440G-T27178 Guardmaster TLS-GD2 safety interlock switch. This robust, reliable, and expertly engineered device is purpose-built for critical industrial protection, safeguarding both your workforce and valuable assets. Invest in unparalleled safety and ensure continuous operational efficiency. Contact Palm Parts Solution today to procure this essential component for your industrial applications.FAQWhat does "power-to-lock" mean for the 440G-T27178?The "power-to-lock" mechanism means that the guard remains securely locked as long as power is applied to the switch. This enhances safety by preventing access until power is deliberately removed, ensuring machinery is safely de-energized before entry is permitted.Can this safety interlock switch be used in washdown environments?Yes, the Allen-Bradley 440G-T27178 features an IP67/IP69K protection rating. This makes it highly resistant to dust ingress and capable of withstanding high-pressure, high-temperature washdowns, making it suitable for pharmaceutical, food processing, and chemical environments.What is the benefit of the versatile 110 V AC/DC supply voltage?The ability to operate on either 110 V AC or DC power offers significant installation flexibility. This allows the 440G-T27178 to be integrated into a wider range of existing control systems without requiring additional power conversion equipment, simplifying wiring and reducing costs.What is the contact configuration of this safety switch?The 440G-T27178 is equipped with a comprehensive contact configuration: two N.C. (normally closed) safety contacts for critical safety circuits and one N.O. (normally open) auxiliary contact for status monitoring or non-safety functions. It also has 1 N.C. / 1 N.O. solenoid contacts.Is this product certified for international use?Yes, the Allen-Bradley 440G-T27178 carries CE, UL, and cUL certifications. These certifications ensure that the product complies with major international safety standards, simplifying its integration into global operations and ensuring regulatory compliance.
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Allen-Bradley 440G-T27178
Overview
This is a genuine Allen-Bradley component. PalmPartsSolution stocks it in new, refurbished, and surplus condition with tested warranty and same-day shipping on in-stock units.
Whether you are sourcing a like-for-like replacement for an existing installation, an emergency spare to keep a line running, or a qualified part for a new build, our team can confirm availability, revision, and lead time before you order.
Key Features
- Genuine Allen-Bradley catalog part
- Tested before shipment
- Backed by PalmPartsSolution warranty
- Cross-reference and revision assistance available
- Compatible with the broader Allen-Bradley automation ecosystem
Compatibility
When ordering, match the full catalog/part number, hardware revision, and firmware revision called out by your Allen-Bradley equipment. Where applicable, confirm:
- Input/output voltage and current rating
- Communication protocol and network role
- Mounting form factor and footprint
- Operating temperature, humidity, and IP rating
- Required certifications (UL, CE, ATEX, marine, etc.)
Not sure which revision you need? Send us the catalog number on the nameplate and we will confirm the correct match.
Replacement Information
Three ways to source this part through PalmPartsSolution:
- Exact replacement — same Allen-Bradley catalog number, new or refurbished, tested and warrantied
- Form-fit-function equivalent — alternate revision or build that drops in without code changes
- Engineered migration — current-generation Allen-Bradley platform with documented conversion notes
Contact our engineering team if you need help choosing between these tracks.
Technical Specifications
- Allen-Bradley Code: 440G-T27178
- Series: Guardmaster TLS-GD2
- Type: Safety Interlock / Guard Locking Switch
- Supply Voltage: 110 V AC/DC
- Contact Configuration: 2 N.C. (safety), 1 N.O. (auxiliary)
- Solenoid Contacts: 1 N.C. / 1 N.O.
- Actuator Type: GD2 standard
- Connection Type: M20 conduit, 1/2" NPT adapter
- Housing Material: High-grade Plastic
- Protection Rating: IP67 / IP69K
- Operating Temperature: –25 °C to +60 °C
- Certifications: CE, UL, cUL
- Logic: Break-before-make contact configuration
Applications
- Advanced Machine Guarding Systems: Serves as an integral element for preventing access to hazardous machinery during operation or maintenance tasks.
- Critical Industrial Safety Circuits: Essential for implementing fail-safe mechanisms within complex automation setups.
- High-Speed Packaging and Processing Lines: Ensures operator safety while maintaining peak operational efficiency in sectors such as food & beverage and pharmaceuticals.
- Robotics and Automated Manufacturing Lines: Provides reliable guard locking mechanisms for robotic work cells and automated production zones.
- Hazardous Areas with Access Control: Suited for environments demanding stringent control over entry to dangerous processes or equipment.
- Pharmaceutical and Chemical Processing: Its robust protection ratings make it ideal for environments requiring frequent cleaning and washdowns.
Why Choose the 440G-T27178?
The Allen-Bradley 440G-T27178 stands out as a premier choice for industrial safety due to several key advantages:
- Uncompromising Safety Standards: Delivers a high level of safety with a trustworthy guard locking function that actively shields personnel from harm.
- Exceptional Operational Reliability: Engineered to provide consistent and dependable performance, even within the most demanding industrial environments.
- Maximum Protective Assurance: Its significant locking force offers peace of mind, ensuring that guards remain securely locked when safety is the highest priority.
- Trusted Technological Heritage: Benefits from Allen-Bradley's Guardmaster safety technology, a global leader synonymous with advanced industrial safety solutions.
- Durability and Extended Lifespan: Constructed with robust materials and high protection ratings to endure harsh conditions, thereby extending product longevity.
- Global Regulatory Compliance: CE, UL, and cUL certifications confirm compliance with international safety standards, simplifying integration into worldwide operations.
Availability & Shipping
- ▸In stock: 440G-T27178 ready for immediate dispatch from our Florida warehouse.
- ▸Free USA shipping: FedEx Priority (2–5 business days) and UPS Ground (3–5 business days). Expedited options available at checkout.
- ▸Worldwide delivery: FedEx International Priority (1–5 days), UPS International Priority (3–5 days), and USPS International (5–10 days) — rates calculated at checkout.
- ▸Bulk pricing: Volume discounts on request — contact our sales team for quantity quotes.
- ▸Buy with confidence: Every 440G-T27178 ships with a 1-Year PALM Parts warranty and a 30-day return window.
Frequently Asked Questions — Allen-Bradley
Machine down? We ship parts the same day.
New, surplus, and refurbished Allen-Bradley inventory in stock. Request a quote or speak directly with an automation specialist for emergency sourcing.
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Independent Supplier Notice
PALM Parts Solution operates as an independent industrial automation supplier and is not an authorized distributor or affiliate of any listed manufacturer or brand name. Manufacturer trademarks and product names are used solely for identification purposes. Original manufacturer warranties do not apply. All products sold by PALM Parts are backed by our own 1-year warranty.
Product Condition & Firmware
All products are sold as new unless stated otherwise. Original manufacturer packaging may show signs of handling, storage, or shelf wear. Date codes and series may vary from current factory production. PALM Parts does not guarantee the presence, version, or compatibility of any firmware on PLC or automation products.